Isocyanate trimers containing iminooxadiazine dione groups,...

Details Isocyanate trimers containing iminooxadiazine dione groups,... Isocyanate trimers containing iminooxadiazine dione groups,...

C - Chemistry, Metallurgy

07

D

C07D 273/04 (2006.01) C07D 251/32 (2006.01) C07D 413/14 (2006.01) C08G 18/02 (2006.01) C08G 18/78 (2006.01) C08G 18/79 (2006.01)

Patent

CA 2200823

The present invention relates to a polyisocyanate mixture containing isocyanate trimers provided that i) 30 to 100 mole percent of the trimers are iminooxadiazine diones B and Image ii) 0 to 70 mole percent of the trimers are isocyanurates A iii) less than 10 mole percent of the polyisocyanate mixture is of the uretone imine structural type, and iv) the ratio of the sum of the mole percents of trimers A and B to the mole percent of uretdiones is greater than 4:1 wherein R1 , R2 and R3 are the same or different and represent the groups obtained by removing an isocyanate group from an aliphatic, cycloaliphatic, aromatic and/or araliphatic isocyanate having an NCO content of less than 70% and/or their oligomers. The present invention also relates to a process for the preparation of these isocyanate trimers, mixtures of these isocyanate trimers with other polyisocyanates and compositions containing these isocyanate trimers, in which the isocyanate groups may optionally be blocked with blocking agents, and compounds containing two or more isocyanate-reactive groups. The polyisocyanate mixtures are useful; as starting materials for preparing active ingredients and optionally foamed plastics materials and for the preparation of lacquers, coating compositions, adhesives and additives.

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